Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Current assets
Allowances for doubtful accounts	$ 60.6	$ 71.7
Accumulated depreciation and amortization	$ 428.5	$ 418.8
Diebold Nixdorf, Incorporated shareholders' equity
Preferred shares, par value	$ 0	$ 0
Preferred shares, shares authorized	1,000,000	1,000,000
Preferred shares, shares issued	0	0
Common shares, par value	$ 1.25	$ 1.25
Common shares, shares authorized	125,000,000	125,000,000
Common shares, shares issued	91,242,389	90,524,360
Common shares, shares outstanding	76,092,237	75,558,544
Treasury shares, at cost, shares	15,150,152	14,965,816